Add delete branch track on pull request comments (#888)

* add delete branch track on pull request comments

* don't change vendor

models/issue.go

@@ -685,6 +685,24 @@ func (issue *Issue) ChangeTitle(doer *User, title string) (err error) {
 	return nil
 }
 
+// AddDeletePRBranchComment adds delete branch comment for pull request issue
+func AddDeletePRBranchComment(doer *User, repo *Repository, issueID int64, branchName string) error {
+	issue, err := getIssueByID(x, issueID)
+	if err != nil {
+		return err
+	}
+	sess := x.NewSession()
+	defer sess.Close()
+	if err := sess.Begin(); err != nil {
+		return err
+	}
+	if _, err := createDeleteBranchComment(sess, doer, repo, issue, branchName); err != nil {
+		return err
+	}
+
+	return sess.Commit()
+}
+
 // ChangeContent changes issue content, as the given user.
 func (issue *Issue) ChangeContent(doer *User, content string) (err error) {
 	oldContent := issue.Content

models/issue_comment.go

@@ -44,6 +44,8 @@ const (
 	CommentTypeAssignees
 	// Change Title
 	CommentTypeChangeTitle
+	// Delete Branch
+	CommentTypeDeleteBranch
 )
 
 // CommentTag defines comment tag type
@@ -472,6 +474,16 @@ func createChangeTitleComment(e *xorm.Session, doer *User, repo *Repository, iss
 	})
 }
 
+func createDeleteBranchComment(e *xorm.Session, doer *User, repo *Repository, issue *Issue, branchName string) (*Comment, error) {
+	return createComment(e, &CreateCommentOptions{
+		Type:      CommentTypeDeleteBranch,
+		Doer:      doer,
+		Repo:      repo,
+		Issue:     issue,
+		CommitSHA: branchName,
+	})
+}
+
 // CreateCommentOptions defines options for creating comment
 type CreateCommentOptions struct {
 	Type  CommentType